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No oil pressure

Tiny
FREESTYLEFRANK
  • MEMBER
  • 2005 GMC YUKON
  • 6.0L
  • 4 CYL
  • 4WD
  • 260,000 MILES
Engine shuts off as soon as I start it. I know this is a safety feature for the engine. I have changed the oil pump, cleaned the oil pan and pump screen. I am at a loss.
Please note: This vehicle is an eight cylinder not a four cylinder.
Saturday, October 5th, 2019 AT 8:28 AM

5 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good evening,

This sounds light a security issue, not an oil pressure issue.

Does the theft light go off after the key is turned on in about 10 seconds?

https://www.2carpros.com/articles/how-to-reset-a-security-system

Roy
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Saturday, October 5th, 2019 AT 3:54 PM
Tiny
FREESTYLEFRANK
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  • 3 POSTS
Yeah, the theft light is not illuminated.
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Saturday, October 5th, 2019 AT 5:11 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Okay, then the next step is to do a manual oil pressure test to see if it is either a real oil pressure issue or the sender unit is sending a false signal.

Remove the sender unit and insert a manual gauge and crank up the motor and see if it has oil pressure.

Roy
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Sunday, October 6th, 2019 AT 5:00 AM
Tiny
FREESTYLEFRANK
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  • 3 POSTS
Thanks, I'll give that shot.
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Sunday, October 6th, 2019 AT 5:50 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
You are welcome.

Keep me updated.

Roy
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Sunday, October 6th, 2019 AT 5:57 AM

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